英语语法分析

She then laid twenty mattresses one upon another over the three peas, and put twenty feather beds over the mattresses.

她在三粒豌豆上面放了二十床垫子，又在垫子上放了二十床鸭绒被。

You get what you pay for when it comes to mattresses.

买床垫，你就买到了实惠。

I carry seating mattresses and bolsters up to the flat roof.

我负责搬坐垫上屋顶平台。